Date: Wed, 30 May 2018 14:53:42 -0700 From: "K. Macy" <kmacy@freebsd.org> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.cn85.dnsmgr.net> Cc: "Herbert J. Skuhra" <herbert@gojira.at>, freebsd-net@freebsd.org Subject: Re: 'no route to host" for cloned lo1 iface 12.0-CURRENT r334376+56a973815425(master) amd64 Message-ID: <CAHM0Q_NdqqCSpyrwBqHm5Ma%2B8-M2Lj8VDJ_Ed6Xqk8jjOTEAZQ@mail.gmail.com> In-Reply-To: <201805302148.w4ULmsq4073733@pdx.rh.CN85.dnsmgr.net> References: <876034evol.wl-herbert@gojira.at> <201805302148.w4ULmsq4073733@pdx.rh.CN85.dnsmgr.net>
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Could you please try 334117 vs 334118 and see if 334118 introduces
this regression?
-M
On Wed, May 30, 2018 at 2:48 PM, Rodney W. Grimes
<freebsd-rwg@pdx.rh.cn85.dnsmgr.net> wrote:
>> On Wed, 30 May 2018 17:46:06 +0200, "Rodney W. Grimes" wrote:
>> >
>> > > On Wed, May 30, 2018 at 07:44:52AM -0700, Rodney W. Grimes wrote:
>> > > > > On Wed, May 30, 2018 at 03:59:12PM +0200, Andreas Nilsson wrote:
>> > > > > > On Wed, May 30, 2018 at 3:40 PM, Dave Cottlehuber <dch@skunkwerks.at> wrote:
>> > > > > >
>> > > > > > > I have 10.241.0.0-15/16 bound to lo1 for jails, and I just realised it
>> > > > > > > doesn't work anymore. Boxes at $DAYJOB use the same config and work just
>> > > > > > > fine on 11.1R/amd64, otherwise I'd be fired.... this used to work ~ 1 month
>> > > > > > > ago, both on my desktop, and my laptop, and now doesn't.
>> > > > > > >
>> > > > > > > Have I mis-configured something blindingly obvious here before I embark
>> > > > > > > on a lengthy bisect?
>> > > > > > >
>> > > > > > > # grep -v \# /etc/rc.conf , elided
>> > > > > > > hostname=akai
>> > > > > > > kld_list="${kld_list} if_iwm if_axge if_ure if_ue"
>> > > > > > > ifconfig_ue0=DHCP
>> > > > > > > ifconfig_ue0_ipv6="inet6 accept_rtadv"
>> > > > > > > wlans_iwm0="wlan0"
>> > > > > > > ifconfig_wlan0="WPA DHCP"
>> > > > > > > ifconfig_wlan0_ipv6="inet6 accept_rtadv"
>> > > > > > > create_args_wlan0="country AT regdomain ETSI"
>> > > > > > > cloned_interfaces="${cloned_interfaces} lo1"
>> > > > > > > ifconfig_lo1_aliases="inet 10.241.0.0-15/16"
>> > > > > > > ip6addrctl_policy="ipv4_prefer"
>> > > > > > >
>> > > > > > > # netstat -4rn
>> > > > > > > Internet:
>> > > > > > > Destination Gateway Flags Netif Expire
>> > > > > > > default 172.16.2.1 UGS ue0
>> > > > > > > 10.241.0.0 link#4 UH lo1
>> > > > > > > 10.241.0.1 link#4 UH lo1
>> > > > > > > 10.241.0.2 link#4 UH lo1
>> > > > > > > 10.241.0.3 link#4 UH lo1
>> > > > > > > 10.241.0.4 link#4 UH lo1
>> > > > > > > 10.241.0.5 link#4 UH lo1
>> > > > > > > 10.241.0.6 link#4 UH lo1
>> > > > > > > 10.241.0.7 link#4 UH lo1
>> > > > > > > 10.241.0.8 link#4 UH lo1
>> > > > > > > 10.241.0.9 link#4 UH lo1
>> > > > > > > 10.241.0.10 link#4 UH lo1
>> > > > > > > 10.241.0.11 link#4 UH lo1
>> > > > > > > 10.241.0.12 link#4 UH lo1
>> > > > > > > 10.241.0.13 link#4 UH lo1
>> > > > > > > 10.241.0.14 link#4 UH lo1
>> > > > > > > 10.241.0.15 link#4 UH lo1
>> > > > > > > 127.0.0.1 link#1 UH lo0
>> > > > > > > 172.16.2.0/24 link#2 U ue0
>> > > > > > > 172.16.2.92 link#3 UHS lo0
>> > > > > > > 172.16.2.93 link#2 UHS lo0
>> > > > > > >
>> > > > > > > # ifconfig
>> > > > > > > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>> > > > > > > options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
>> > > > > > > inet6 ::1 prefixlen 128
>> > > > > > > inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
>> > > > > > > inet 127.0.0.1 netmask 0xff000000
>> > > > > > > nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>> > > > > > > groups: lo
>> > > > > > > ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>> > > > > > > options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
>> > > > > > > ether 74:da:38:d8:fe:a7
>> > > > > > > inet6 fe80::76da:38ff:fed8:fea7%ue0 prefixlen 64 scopeid 0x2
>> > > > > > > inet 172.16.2.93 netmask 0xffffff00 broadcast 172.16.2.255
>> > > > > > > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
>> > > > > > > media: Ethernet autoselect (1000baseT <full-duplex>)
>> > > > > > > status: active
>> > > > > > > wlan0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
>> > > > > > > 0 mtu 1500
>> > > > > > > ether 00:28:f8:d0:91:52
>> > > > > > > inet6 fe80::228:f8ff:fed0:9152%wlan0 prefixlen 64 scopeid 0x3
>> > > > > > > inet 172.16.2.92 netmask 0xffffff00 broadcast 172.16.2.255
>> > > > > > > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
>> > > > > > > media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11g
>> > > > > > > status: associated
>> > > > > > > ssid skunkwerks channel 6 (2437 MHz 11g) bssid 80:2a:a8:5a:bd:3f
>> > > > > > > regdomain ETSI country AT authmode WPA2/802.11i privacy ON
>> > > > > > > deftxkey UNDEF AES-CCM 2:128-bit txpower 30 bmiss 10 scanvalid 60
>> > > > > > > protmode CTS wme roaming MANUAL
>> > > > > > > groups: wlan
>> > > > > > > lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>> > > > > > > options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
>> > > > > > > inet 10.241.0.0 netmask 0xffff0000
>> > > > > > > inet 10.241.0.1 netmask 0xffffffff
>> > > > > > > inet 10.241.0.2 netmask 0xffffffff
>> > > > > > > inet 10.241.0.3 netmask 0xffffffff
>> > > > > > > inet 10.241.0.4 netmask 0xffffffff
>> > > > > > > inet 10.241.0.5 netmask 0xffffffff
>> > > > > > > inet 10.241.0.6 netmask 0xffffffff
>> > > > > > > inet 10.241.0.7 netmask 0xffffffff
>> > > > > > > inet 10.241.0.8 netmask 0xffffffff
>> > > > > > > inet 10.241.0.9 netmask 0xffffffff
>> > > > > > > inet 10.241.0.10 netmask 0xffffffff
>> > > > > > > inet 10.241.0.11 netmask 0xffffffff
>> > > > > > > inet 10.241.0.12 netmask 0xffffffff
>> > > > > > > inet 10.241.0.13 netmask 0xffffffff
>> > > > > > > inet 10.241.0.14 netmask 0xffffffff
>> > > > > > > inet 10.241.0.15 netmask 0xffffffff
>> > > > > > > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>> > > > > > > groups: lo
>> > > > > > > bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
>> > > > > > > 1500
>> > > > > > > description: vm-public
>> > > > > > > ether 02:63:d4:40:fe:00
>> > > > > > > nd6 options=1<PERFORMNUD>
>> > > > > > > groups: bridge
>> > > > > > > id 00:00:00:00:00:00 priority 0 hellotime 2 fwddelay 15
>> > > > > > > maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
>> > > > > > > root id 00:00:00:00:00:00 priority 0 ifcost 0 port 0
>> > > > > > > member: wlan0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>> > > > > > > ifmaxaddr 0 port 3 priority 128 path cost 370370
>> > > > > >
>> >
>> > > > > >
>> > > > > > could you specify what exactly isn't working? How does the bridge fit into
>> > > > > > this setup?
>> > > > > >
>> > > > > > Best regards
>> > > > > > Andreas
>> > > > >
>> > > > > Hi,
>> > > > >
>> > > > > I think the problem is "No route to host".
>> > > >
>> > > > What command is trying to execute when this error is returned
>> > > > would help a great deal in trying to understand why it failed.
>> > >
>> > > I've just added the lines
>> > >
>> > > cloned_interfaces="lo1"
>> > > ifconfig_lo1_aliases="inet 10.241.0.0-15/16"
>> > >
>> > > to my rc.conf and rebooted.
>> > >
>> > > % ping 10.241.0.0
>> > > PING 10.241.0.0 (10.241.0.0): 56 data bytes
>> > > ping: sendto: No route to host
>> > >
>> > > Changed lines to
>> > >
>> > > cloned_interfaces="lo1"
>> > > ifconfig_lo1="inet 10.241.0.0 netmask 0xffff0000"
>> > That is technically an invalid ifconfig.
>> > Your not suppose to use the "0"th host of a network.
>> >
>> > > ifconfig_lo1_aliases="inet 10.241.0.1-15 netmask 0xffffffff"
>> > >
>> > > and rebooted.
>> > >
>> > > % ping 10.241.0.0
>> > > PING 10.241.0.0 (10.241.0.0): 56 data bytes
>> > > 64 bytes from 10.241.0.0: icmp_seq=0 ttl=64 time=0.085 ms
>> >
>> > Sending a packet to the "0"th IP on a network has special
>> > meaning, I just can not recall or find right now what that
>> > special meaning is and where it is documented. Is it
>> > "this host" on that network?
>> >
>> > Either way it is invalid to configure a "host" at an address
>> > that the host part of a ip address is all 0's, as that is
>> > reserved to mean "the network".
>> >
>> > Not that 10.241.1.0 IS a valid address, because of the subnet mask
>> > being /16 the host part contains 1.0, a valid non zero host part.
>>
>> Thanks. I wouldn't use such a network configuration myself. Just
>> wondering why one example works and the other doesn't although output
>> of e.g. ifconfig and netstat looks the same. And why Daves' configuration
>> worked before and nolonger does.
>
> Those are very good questions, and we should research into
> the answers for them. I suspect that this may of come about
> from the changes in the way the routing code works that use
> to reject the use of a "0" host address and no longer does.
>
> --
> Rod Grimes rgrimes@freebsd.org
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